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android / platform / system / bt / cb03ab0107b265bc10bfd536d60d39c1bf141154 / . / bta / gatt / bta_gattc_cache.cc
blob: 110e534c312d6907feefb4d74badb4777eb6ba7d [file] [log] [blame]
/******************************************************************************
*
* Copyright (C) 2003-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* This file contains the GATT client discovery procedures and cache
* related functions.
*
******************************************************************************/
#define LOG_TAG "bt_bta_gattc"
#include "bt_target.h"
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include "bt_common.h"
#include "bta_gattc_int.h"
#include "bta_sys.h"
#include "btm_api.h"
#include "btm_ble_api.h"
#include "btm_int.h"
#include "osi/include/log.h"
#include "osi/include/osi.h"
#include "sdp_api.h"
#include "sdpdefs.h"
#include "utl.h"
static void bta_gattc_cache_write(const RawAddress& server_bda,
uint16_t num_attr, tBTA_GATTC_NV_ATTR* attr);
static void bta_gattc_char_dscpt_disc_cmpl(uint16_t conn_id,
tBTA_GATTC_SERV* p_srvc_cb);
static tBTA_GATT_STATUS bta_gattc_sdp_service_disc(
uint16_t conn_id, tBTA_GATTC_SERV* p_server_cb);
extern void bta_to_btif_uuid(bt_uuid_t* p_dest, tBT_UUID* p_src);
tBTA_GATTC_SERVICE* bta_gattc_find_matching_service(const list_t* services,
uint16_t handle);
tBTA_GATTC_DESCRIPTOR* bta_gattc_get_descriptor_srcb(tBTA_GATTC_SERV* p_srcb,
uint16_t handle);
tBTA_GATTC_CHARACTERISTIC* bta_gattc_get_characteristic_srcb(
tBTA_GATTC_SERV* p_srcb, uint16_t handle);
#define BTA_GATT_SDP_DB_SIZE 4096
#define GATT_CACHE_PREFIX "/data/misc/bluetooth/gatt_cache_"
#define GATT_CACHE_VERSION 2
static void bta_gattc_generate_cache_file_name(char* buffer, size_t buffer_len,
const RawAddress& bda) {
snprintf(buffer, buffer_len, "%s%02x%02x%02x%02x%02x%02x", GATT_CACHE_PREFIX,
bda.address[0], bda.address[1], bda.address[2], bda.address[3],
bda.address[4], bda.address[5]);
}
/*****************************************************************************
* Constants and data types
****************************************************************************/
typedef struct {
tSDP_DISCOVERY_DB* p_sdp_db;
uint16_t sdp_conn_id;
} tBTA_GATTC_CB_DATA;
#if (BTA_GATT_DEBUG == TRUE)
static char* bta_gattc_attr_type[] = {
"I", /* Included Service */
"C", /* Characteristic */
"D" /* Characteristic Descriptor */
};
/* utility functions */
bool display_cache_attribute(void* data, void* context) {
tBTA_GATTC_CACHE_ATTR* p_attr = data;
APPL_TRACE_ERROR("\t Attr handle[%d] uuid[0x%04x] type[%s] prop[0x%1x]",
p_attr->handle, p_attr->uuid.uu.uuid16,
bta_gattc_attr_type[p_attr->attr_type], p_attr->property);
return true;
}
bool display_cache_service(void* data, void* context) {
tBTA_GATTC_SERVICE* p_cur_srvc = data;
APPL_TRACE_ERROR("Service: handle[%d ~ %d] %s[0x%04x] inst[%d]",
p_cur_srvc->s_handle, p_cur_srvc->e_handle,
((p_cur_srvc->uuid.len == 2) ? "uuid16" : "uuid128"),
p_cur_srvc->uuid.uu.uuid16, p_cur_srvc->handle);
if (p_cur_srvc->characteristics != NULL) {
list_foreach(p_cur_srvc->characteristics, display_cache_attribute, NULL);
}
return true;
}
/*******************************************************************************
*
* Function bta_gattc_display_cache_server
*
* Description debug function to display the server cache.
*
* Returns none.
*
******************************************************************************/
static void bta_gattc_display_cache_server(list_t* p_cache) {
APPL_TRACE_ERROR("<================Start Server Cache =============>");
list_foreach(p_cache, display_cache_service, NULL);
APPL_TRACE_ERROR("<================End Server Cache =============>");
APPL_TRACE_ERROR(" ");
}
/*******************************************************************************
*
* Function bta_gattc_display_explore_record
*
* Description debug function to display the exploration list
*
* Returns none.
*
******************************************************************************/
static void bta_gattc_display_explore_record(tBTA_GATTC_ATTR_REC* p_rec,
uint8_t num_rec) {
uint8_t i;
tBTA_GATTC_ATTR_REC* pp = p_rec;
APPL_TRACE_ERROR("<================Start Explore Queue =============>");
for (i = 0; i < num_rec; i++, pp++) {
APPL_TRACE_ERROR(
"\t rec[%d] uuid[0x%04x] s_handle[%d] e_handle[%d] is_primary[%d]",
i + 1, pp->uuid.uu.uuid16, pp->s_handle, pp->e_handle, pp->is_primary);
}
APPL_TRACE_ERROR("<================ End Explore Queue =============>");
APPL_TRACE_ERROR(" ");
}
#endif /* BTA_GATT_DEBUG == TRUE */
/*******************************************************************************
*
* Function bta_gattc_init_cache
*
* Description Initialize the database cache and discovery related
* resources.
*
* Returns status
*
******************************************************************************/
tBTA_GATT_STATUS bta_gattc_init_cache(tBTA_GATTC_SERV* p_srvc_cb) {
if (p_srvc_cb->p_srvc_cache != NULL) {
list_free(p_srvc_cb->p_srvc_cache);
p_srvc_cb->p_srvc_cache = NULL;
}
osi_free(p_srvc_cb->p_srvc_list);
p_srvc_cb->p_srvc_list =
(tBTA_GATTC_ATTR_REC*)osi_malloc(BTA_GATTC_ATTR_LIST_SIZE);
p_srvc_cb->total_srvc = 0;
p_srvc_cb->cur_srvc_idx = 0;
p_srvc_cb->cur_char_idx = 0;
p_srvc_cb->next_avail_idx = 0;
return BTA_GATT_OK;
}
static void characteristic_free(void* ptr) {
tBTA_GATTC_CHARACTERISTIC* p_char = (tBTA_GATTC_CHARACTERISTIC*)ptr;
list_free(p_char->descriptors);
osi_free(p_char);
}
static void service_free(void* ptr) {
tBTA_GATTC_SERVICE* srvc = (tBTA_GATTC_SERVICE*)ptr;
list_free(srvc->characteristics);
list_free(srvc->included_svc);
osi_free(srvc);
}
/*******************************************************************************
*
* Function bta_gattc_add_srvc_to_cache
*
* Description Add a service into database cache.
*
* Returns status
*
******************************************************************************/
static tBTA_GATT_STATUS bta_gattc_add_srvc_to_cache(tBTA_GATTC_SERV* p_srvc_cb,
uint16_t s_handle,
uint16_t e_handle,
tBT_UUID* p_uuid,
bool is_primary) {
#if (BTA_GATT_DEBUG == TRUE)
APPL_TRACE_DEBUG("Add a service into Service");
#endif
tBTA_GATTC_SERVICE* p_new_srvc =
(tBTA_GATTC_SERVICE*)osi_malloc(sizeof(tBTA_GATTC_SERVICE));
/* update service information */
p_new_srvc->s_handle = s_handle;
p_new_srvc->e_handle = e_handle;
p_new_srvc->is_primary = is_primary;
memcpy(&p_new_srvc->uuid, p_uuid, sizeof(tBT_UUID));
p_new_srvc->handle = s_handle;
p_new_srvc->characteristics = list_new(characteristic_free);
p_new_srvc->included_svc = list_new(osi_free);
if (p_srvc_cb->p_srvc_cache == NULL) {
p_srvc_cb->p_srvc_cache = list_new(service_free);
}
list_append(p_srvc_cb->p_srvc_cache, p_new_srvc);
return BTA_GATT_OK;
}
static tBTA_GATT_STATUS bta_gattc_add_char_to_cache(tBTA_GATTC_SERV* p_srvc_cb,
uint16_t attr_handle,
uint16_t value_handle,
tBT_UUID* p_uuid,
uint8_t property) {
#if (BTA_GATT_DEBUG == TRUE)
APPL_TRACE_DEBUG("%s: Add a characteristic into Service", __func__);
APPL_TRACE_DEBUG("handle=%d uuid16=0x%x property=0x%x", value_handle,
p_uuid->uu.uuid16, property);
#endif
tBTA_GATTC_SERVICE* service =
bta_gattc_find_matching_service(p_srvc_cb->p_srvc_cache, attr_handle);
if (!service) {
APPL_TRACE_ERROR(
"Illegal action to add char/descr/incl srvc for non-existing service!");
return GATT_WRONG_STATE;
}
/* TODO(jpawlowski): We should use attribute handle, not value handle to refer
to characteristic.
This is just a temporary workaround.
*/
if (service->e_handle < value_handle) service->e_handle = value_handle;
tBTA_GATTC_CHARACTERISTIC* characteristic =
(tBTA_GATTC_CHARACTERISTIC*)osi_malloc(sizeof(tBTA_GATTC_CHARACTERISTIC));
characteristic->handle = value_handle;
characteristic->properties = property;
characteristic->descriptors = list_new(osi_free);
memcpy(&characteristic->uuid, p_uuid, sizeof(tBT_UUID));
characteristic->service = service;
list_append(service->characteristics, characteristic);
return BTA_GATT_OK;
}
/*******************************************************************************
*
* Function bta_gattc_add_attr_to_cache
*
* Description Add an attribute into database cache buffer.
*
* Returns status
*
******************************************************************************/
static tBTA_GATT_STATUS bta_gattc_add_attr_to_cache(
tBTA_GATTC_SERV* p_srvc_cb, uint16_t handle, tBT_UUID* p_uuid,
uint8_t property, uint16_t incl_srvc_s_handle, tBTA_GATTC_ATTR_TYPE type) {
#if (BTA_GATT_DEBUG == TRUE)
APPL_TRACE_DEBUG("%s: Add a [%s] into Service", __func__,
bta_gattc_attr_type[type]);
APPL_TRACE_DEBUG("handle=%d uuid16=0x%x property=0x%x type=%d", handle,
p_uuid->uu.uuid16, property, type);
#endif
tBTA_GATTC_SERVICE* service =
bta_gattc_find_matching_service(p_srvc_cb->p_srvc_cache, handle);
if (!service) {
APPL_TRACE_ERROR(
"Illegal action to add char/descr/incl srvc for non-existing service!");
return GATT_WRONG_STATE;
}
if (type == BTA_GATTC_ATTR_TYPE_INCL_SRVC) {
tBTA_GATTC_INCLUDED_SVC* isvc =
(tBTA_GATTC_INCLUDED_SVC*)osi_malloc(sizeof(tBTA_GATTC_INCLUDED_SVC));
isvc->handle = handle;
memcpy(&isvc->uuid, p_uuid, sizeof(tBT_UUID));
isvc->owning_service = service;
isvc->included_service = bta_gattc_find_matching_service(
p_srvc_cb->p_srvc_cache, incl_srvc_s_handle);
if (!isvc->included_service) {
APPL_TRACE_ERROR(
"%s: Illegal action to add non-existing included service!", __func__);
osi_free(isvc);
return GATT_WRONG_STATE;
}
list_append(service->included_svc, isvc);
} else if (type == BTA_GATTC_ATTR_TYPE_CHAR_DESCR) {
tBTA_GATTC_DESCRIPTOR* descriptor =
(tBTA_GATTC_DESCRIPTOR*)osi_malloc(sizeof(tBTA_GATTC_DESCRIPTOR));
descriptor->handle = handle;
memcpy(&descriptor->uuid, p_uuid, sizeof(tBT_UUID));
if (service->characteristics == NULL ||
list_is_empty(service->characteristics)) {
APPL_TRACE_ERROR(
"%s: Illegal action to add descriptor before adding a "
"characteristic!",
__func__);
osi_free(descriptor);
return GATT_WRONG_STATE;
}
tBTA_GATTC_CHARACTERISTIC* char_node =
(tBTA_GATTC_CHARACTERISTIC*)list_back(service->characteristics);
descriptor->characteristic = char_node;
list_append(char_node->descriptors, descriptor);
}
return BTA_GATT_OK;
}
/*******************************************************************************
*
* Function bta_gattc_get_disc_range
*
* Description get discovery stating and ending handle range.
*
* Returns None.
*
******************************************************************************/
void bta_gattc_get_disc_range(tBTA_GATTC_SERV* p_srvc_cb, uint16_t* p_s_hdl,
uint16_t* p_e_hdl, bool is_srvc) {
tBTA_GATTC_ATTR_REC* p_rec = NULL;
if (is_srvc) {
p_rec = p_srvc_cb->p_srvc_list + p_srvc_cb->cur_srvc_idx;
*p_s_hdl = p_rec->s_handle;
} else {
p_rec = p_srvc_cb->p_srvc_list + p_srvc_cb->cur_char_idx;
*p_s_hdl = p_rec->s_handle + 1;
}
*p_e_hdl = p_rec->e_handle;
#if (BTA_GATT_DEBUG == TRUE)
APPL_TRACE_DEBUG("discover range [%d ~ %d]", p_rec->s_handle,
p_rec->e_handle);
#endif
return;
}
/*******************************************************************************
*
* Function bta_gattc_discover_pri_service
*
* Description Start primary service discovery
*
* Returns status of the operation.
*
******************************************************************************/
tBTA_GATT_STATUS bta_gattc_discover_pri_service(uint16_t conn_id,
tBTA_GATTC_SERV* p_server_cb,
uint8_t disc_type) {
tBTA_GATTC_CLCB* p_clcb = bta_gattc_find_clcb_by_conn_id(conn_id);
tBTA_GATT_STATUS status = BTA_GATT_ERROR;
if (p_clcb) {
if (p_clcb->transport == BTA_TRANSPORT_LE)
status = bta_gattc_discover_procedure(conn_id, p_server_cb, disc_type);
else
status = bta_gattc_sdp_service_disc(conn_id, p_server_cb);
}
return status;
}
/*******************************************************************************
*
* Function bta_gattc_discover_procedure
*
* Description Start a particular type of discovery procedure on server.
*
* Returns status of the operation.
*
******************************************************************************/
tBTA_GATT_STATUS bta_gattc_discover_procedure(uint16_t conn_id,
tBTA_GATTC_SERV* p_server_cb,
uint8_t disc_type) {
tGATT_DISC_PARAM param;
bool is_service = true;
memset(&param, 0, sizeof(tGATT_DISC_PARAM));
if (disc_type == GATT_DISC_SRVC_ALL || disc_type == GATT_DISC_SRVC_BY_UUID) {
param.s_handle = 1;
param.e_handle = 0xFFFF;
} else {
if (disc_type == GATT_DISC_CHAR_DSCPT) is_service = false;
bta_gattc_get_disc_range(p_server_cb, &param.s_handle, &param.e_handle,
is_service);
if (param.s_handle > param.e_handle) {
return GATT_ERROR;
}
}
return GATTC_Discover(conn_id, disc_type, &param);
}
/*******************************************************************************
*
* Function bta_gattc_start_disc_include_srvc
*
* Description Start discovery for included service
*
* Returns status of the operation.
*
******************************************************************************/
tBTA_GATT_STATUS bta_gattc_start_disc_include_srvc(uint16_t conn_id,
tBTA_GATTC_SERV* p_srvc_cb) {
return bta_gattc_discover_procedure(conn_id, p_srvc_cb, GATT_DISC_INC_SRVC);
}
/*******************************************************************************
*
* Function bta_gattc_start_disc_char
*
* Description Start discovery for characteristic
*
* Returns status of the operation.
*
******************************************************************************/
tBTA_GATT_STATUS bta_gattc_start_disc_char(uint16_t conn_id,
tBTA_GATTC_SERV* p_srvc_cb) {
p_srvc_cb->total_char = 0;
return bta_gattc_discover_procedure(conn_id, p_srvc_cb, GATT_DISC_CHAR);
}
/*******************************************************************************
*
* Function bta_gattc_start_disc_char_dscp
*
* Description Start discovery for characteristic descriptor
*
* Returns none.
*
******************************************************************************/
void bta_gattc_start_disc_char_dscp(uint16_t conn_id,
tBTA_GATTC_SERV* p_srvc_cb) {
APPL_TRACE_DEBUG("starting discover characteristics descriptor");
if (bta_gattc_discover_procedure(conn_id, p_srvc_cb, GATT_DISC_CHAR_DSCPT) !=
0)
bta_gattc_char_dscpt_disc_cmpl(conn_id, p_srvc_cb);
}
/*******************************************************************************
*
* Function bta_gattc_explore_srvc
*
* Description process the service discovery complete event
*
* Returns status
*
******************************************************************************/
static void bta_gattc_explore_srvc(uint16_t conn_id,
tBTA_GATTC_SERV* p_srvc_cb) {
tBTA_GATTC_ATTR_REC* p_rec = p_srvc_cb->p_srvc_list + p_srvc_cb->cur_srvc_idx;
tBTA_GATTC_CLCB* p_clcb = bta_gattc_find_clcb_by_conn_id(conn_id);
APPL_TRACE_DEBUG("Start service discovery: srvc_idx = %d",
p_srvc_cb->cur_srvc_idx);
p_srvc_cb->cur_char_idx = p_srvc_cb->next_avail_idx = p_srvc_cb->total_srvc;
if (p_clcb == NULL) {
APPL_TRACE_ERROR("unknown connection ID");
return;
}
/* start expore a service if there is service not been explored */
if (p_srvc_cb->cur_srvc_idx < p_srvc_cb->total_srvc) {
/* add the first service into cache */
if (bta_gattc_add_srvc_to_cache(p_srvc_cb, p_rec->s_handle, p_rec->e_handle,
&p_rec->uuid, p_rec->is_primary) == 0) {
/* start discovering included services */
bta_gattc_start_disc_include_srvc(conn_id, p_srvc_cb);
return;
}
}
/* no service found at all, the end of server discovery*/
LOG_WARN(LOG_TAG, "%s no more services found", __func__);
#if (BTA_GATT_DEBUG == TRUE)
bta_gattc_display_cache_server(p_srvc_cb->p_srvc_cache);
#endif
/* save cache to NV */
p_clcb->p_srcb->state = BTA_GATTC_SERV_SAVE;
if (btm_sec_is_a_bonded_dev(p_srvc_cb->server_bda)) {
bta_gattc_cache_save(p_clcb->p_srcb, p_clcb->bta_conn_id);
}
bta_gattc_reset_discover_st(p_clcb->p_srcb, BTA_GATT_OK);
}
/*******************************************************************************
*
* Function bta_gattc_incl_srvc_disc_cmpl
*
* Description process the relationship discovery complete event
*
* Returns status
*
******************************************************************************/
static void bta_gattc_incl_srvc_disc_cmpl(uint16_t conn_id,
tBTA_GATTC_SERV* p_srvc_cb) {
p_srvc_cb->cur_char_idx = p_srvc_cb->total_srvc;
/* start discoverying characteristic */
bta_gattc_start_disc_char(conn_id, p_srvc_cb);
}
/*******************************************************************************
*
* Function bta_gattc_char_disc_cmpl
*
* Description process the characteristic discovery complete event
*
* Returns status
*
******************************************************************************/
static void bta_gattc_char_disc_cmpl(uint16_t conn_id,
tBTA_GATTC_SERV* p_srvc_cb) {
tBTA_GATTC_ATTR_REC* p_rec = p_srvc_cb->p_srvc_list + p_srvc_cb->cur_char_idx;
/* if there are characteristic needs to be explored */
if (p_srvc_cb->total_char > 0) {
/* add the first characteristic into cache */
bta_gattc_add_char_to_cache(p_srvc_cb, p_rec->char_decl_handle,
p_rec->s_handle, &p_rec->uuid, p_rec->property);
/* start discoverying characteristic descriptor , if failed, disc for next
* char*/
bta_gattc_start_disc_char_dscp(conn_id, p_srvc_cb);
} else /* otherwise start with next service */
{
p_srvc_cb->cur_srvc_idx++;
bta_gattc_explore_srvc(conn_id, p_srvc_cb);
}
}
/*******************************************************************************
*
* Function bta_gattc_char_dscpt_disc_cmpl
*
* Description process the char descriptor discovery complete event
*
* Returns status
*
******************************************************************************/
static void bta_gattc_char_dscpt_disc_cmpl(uint16_t conn_id,
tBTA_GATTC_SERV* p_srvc_cb) {
tBTA_GATTC_ATTR_REC* p_rec = NULL;
if (--p_srvc_cb->total_char > 0) {
p_rec = p_srvc_cb->p_srvc_list + (++p_srvc_cb->cur_char_idx);
/* add the next characteristic into cache */
bta_gattc_add_char_to_cache(p_srvc_cb, p_rec->char_decl_handle,
p_rec->s_handle, &p_rec->uuid, p_rec->property);
/* start discoverying next characteristic for char descriptor */
bta_gattc_start_disc_char_dscp(conn_id, p_srvc_cb);
} else
/* all characteristic has been explored, start with next service if any */
{
#if (BTA_GATT_DEBUG == TRUE)
APPL_TRACE_ERROR("all char has been explored");
#endif
p_srvc_cb->cur_srvc_idx++;
bta_gattc_explore_srvc(conn_id, p_srvc_cb);
}
}
static bool bta_gattc_srvc_in_list(tBTA_GATTC_SERV* p_srvc_cb,
uint16_t s_handle, uint16_t e_handle,
UNUSED_ATTR tBT_UUID uuid) {
tBTA_GATTC_ATTR_REC* p_rec = NULL;
uint8_t i;
bool exist_srvc = false;
if (!GATT_HANDLE_IS_VALID(s_handle) || !GATT_HANDLE_IS_VALID(e_handle)) {
APPL_TRACE_ERROR("invalid included service handle: [0x%04x ~ 0x%04x]",
s_handle, e_handle);
exist_srvc = true;
} else {
for (i = 0; i < p_srvc_cb->next_avail_idx; i++) {
p_rec = p_srvc_cb->p_srvc_list + i;
/* a new service should not have any overlap with other service handle
* range */
if (p_rec->s_handle == s_handle || p_rec->e_handle == e_handle) {
exist_srvc = true;
break;
}
}
}
return exist_srvc;
}
/*******************************************************************************
*
* Function bta_gattc_add_srvc_to_list
*
* Description Add a service into explore pending list
*
* Returns status
*
******************************************************************************/
static tBTA_GATT_STATUS bta_gattc_add_srvc_to_list(tBTA_GATTC_SERV* p_srvc_cb,
uint16_t s_handle,
uint16_t e_handle,
tBT_UUID uuid,
bool is_primary) {
tBTA_GATTC_ATTR_REC* p_rec = NULL;
tBTA_GATT_STATUS status = BTA_GATT_OK;
if (p_srvc_cb->p_srvc_list &&
p_srvc_cb->next_avail_idx < BTA_GATTC_MAX_CACHE_CHAR) {
p_rec = p_srvc_cb->p_srvc_list + p_srvc_cb->next_avail_idx;
APPL_TRACE_DEBUG("%s handle=%d, service type=0x%04x", __func__, s_handle,
uuid.uu.uuid16);
p_rec->s_handle = s_handle;
p_rec->e_handle = e_handle;
p_rec->is_primary = is_primary;
memcpy(&p_rec->uuid, &uuid, sizeof(tBT_UUID));
p_srvc_cb->total_srvc++;
p_srvc_cb->next_avail_idx++;
} else { /* allocate bigger buffer ?? */
status = GATT_DB_FULL;
APPL_TRACE_ERROR("service not added, no resources or wrong state");
}
return status;
}
/*******************************************************************************
*
* Function bta_gattc_add_char_to_list
*
* Description Add a characteristic into explore pending list
*
* Returns status
*
******************************************************************************/
static tBTA_GATT_STATUS bta_gattc_add_char_to_list(tBTA_GATTC_SERV* p_srvc_cb,
uint16_t decl_handle,
uint16_t value_handle,
tBT_UUID uuid,
uint8_t property) {
tBTA_GATTC_ATTR_REC* p_rec = NULL;
tBTA_GATT_STATUS status = BTA_GATT_OK;
if (p_srvc_cb->p_srvc_list == NULL) {
APPL_TRACE_ERROR("No service available, unexpected char discovery result");
status = BTA_GATT_INTERNAL_ERROR;
} else if (p_srvc_cb->next_avail_idx < BTA_GATTC_MAX_CACHE_CHAR) {
p_rec = p_srvc_cb->p_srvc_list + p_srvc_cb->next_avail_idx;
p_srvc_cb->total_char++;
p_rec->s_handle = value_handle;
p_rec->char_decl_handle = decl_handle;
p_rec->property = property;
p_rec->e_handle =
(p_srvc_cb->p_srvc_list + p_srvc_cb->cur_srvc_idx)->e_handle;
memcpy(&p_rec->uuid, &uuid, sizeof(tBT_UUID));
/* update the endind handle of pervious characteristic if available */
if (p_srvc_cb->total_char > 1) {
p_rec -= 1;
p_rec->e_handle = decl_handle - 1;
}
p_srvc_cb->next_avail_idx++;
} else {
APPL_TRACE_ERROR("char not added, no resources");
/* allocate bigger buffer ?? */
status = BTA_GATT_DB_FULL;
}
return status;
}
/*******************************************************************************
*
* Function bta_gattc_sdp_callback
*
* Description Process the discovery result from sdp
*
* Returns void
*
******************************************************************************/
void bta_gattc_sdp_callback(uint16_t sdp_status, void* user_data) {
tSDP_DISC_REC* p_sdp_rec = NULL;
tBT_UUID service_uuid;
tSDP_PROTOCOL_ELEM pe;
uint16_t start_handle = 0, end_handle = 0;
tBTA_GATTC_CB_DATA* cb_data = (tBTA_GATTC_CB_DATA*)user_data;
tBTA_GATTC_SERV* p_srvc_cb = bta_gattc_find_scb_by_cid(cb_data->sdp_conn_id);
if (((sdp_status == SDP_SUCCESS) || (sdp_status == SDP_DB_FULL)) &&
p_srvc_cb != NULL) {
do {
/* find a service record, report it */
p_sdp_rec = SDP_FindServiceInDb(cb_data->p_sdp_db, 0, p_sdp_rec);
if (p_sdp_rec) {
if (SDP_FindServiceUUIDInRec(p_sdp_rec, &service_uuid)) {
if (SDP_FindProtocolListElemInRec(p_sdp_rec, UUID_PROTOCOL_ATT,
&pe)) {
start_handle = (uint16_t)pe.params[0];
end_handle = (uint16_t)pe.params[1];
#if (BTA_GATT_DEBUG == TRUE)
APPL_TRACE_EVENT(
"Found ATT service [0x%04x] handle[0x%04x ~ 0x%04x]",
service_uuid.uu.uuid16, start_handle, end_handle);
#endif
if (GATT_HANDLE_IS_VALID(start_handle) &&
GATT_HANDLE_IS_VALID(end_handle) && p_srvc_cb != NULL) {
/* discover services result, add services into a service list */
bta_gattc_add_srvc_to_list(p_srvc_cb, start_handle, end_handle,
service_uuid, true);
} else {
APPL_TRACE_ERROR("invalid start_handle = %d end_handle = %d",
start_handle, end_handle);
}
}
}
}
} while (p_sdp_rec);
}
if (p_srvc_cb != NULL) {
/* start discover primary service */
bta_gattc_explore_srvc(cb_data->sdp_conn_id, p_srvc_cb);
} else {
APPL_TRACE_ERROR("GATT service discovery is done on unknown connection");
}
/* both were allocated in bta_gattc_sdp_service_disc */
osi_free(cb_data->p_sdp_db);
osi_free(cb_data);
}
/*******************************************************************************
*
* Function bta_gattc_sdp_service_disc
*
* Description Start DSP Service Discovert
*
* Returns void
*
******************************************************************************/
static tBTA_GATT_STATUS bta_gattc_sdp_service_disc(
uint16_t conn_id, tBTA_GATTC_SERV* p_server_cb) {
tSDP_UUID uuid;
uint16_t num_attrs = 2;
uint16_t attr_list[2];
memset(&uuid, 0, sizeof(tSDP_UUID));
uuid.len = LEN_UUID_16;
uuid.uu.uuid16 = UUID_PROTOCOL_ATT;
/*
* On success, cb_data will be freed inside bta_gattc_sdp_callback,
* otherwise it will be freed within this function.
*/
tBTA_GATTC_CB_DATA* cb_data =
(tBTA_GATTC_CB_DATA*)osi_malloc(sizeof(tBTA_GATTC_CB_DATA));
cb_data->p_sdp_db = (tSDP_DISCOVERY_DB*)osi_malloc(BTA_GATT_SDP_DB_SIZE);
attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST;
attr_list[1] = ATTR_ID_PROTOCOL_DESC_LIST;
SDP_InitDiscoveryDb(cb_data->p_sdp_db, BTA_GATT_SDP_DB_SIZE, 1, &uuid,
num_attrs, attr_list);
if (!SDP_ServiceSearchAttributeRequest2(p_server_cb->server_bda,
cb_data->p_sdp_db,
&bta_gattc_sdp_callback, cb_data)) {
osi_free(cb_data->p_sdp_db);
osi_free(cb_data);
return BTA_GATT_ERROR;
}
cb_data->sdp_conn_id = conn_id;
return BTA_GATT_OK;
}
/*******************************************************************************
*
* Function bta_gattc_disc_res_cback
* bta_gattc_disc_cmpl_cback
*
* Description callback functions to GATT client stack.
*
* Returns void
*
******************************************************************************/
void bta_gattc_disc_res_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type,
tGATT_DISC_RES* p_data) {
tBTA_GATTC_SERV* p_srvc_cb = NULL;
bool pri_srvc;
tBTA_GATTC_CLCB* p_clcb = bta_gattc_find_clcb_by_conn_id(conn_id);
p_srvc_cb = bta_gattc_find_scb_by_cid(conn_id);
if (p_srvc_cb != NULL && p_clcb != NULL &&
p_clcb->state == BTA_GATTC_DISCOVER_ST) {
switch (disc_type) {
case GATT_DISC_SRVC_ALL:
/* discover services result, add services into a service list */
bta_gattc_add_srvc_to_list(
p_srvc_cb, p_data->handle, p_data->value.group_value.e_handle,
p_data->value.group_value.service_type, true);
break;
case GATT_DISC_SRVC_BY_UUID:
bta_gattc_add_srvc_to_list(
p_srvc_cb, p_data->handle, p_data->value.group_value.e_handle,
p_data->value.group_value.service_type, true);
break;
case GATT_DISC_INC_SRVC:
/* add included service into service list if it's secondary or it never
showed up
in the primary service search */
pri_srvc = bta_gattc_srvc_in_list(
p_srvc_cb, p_data->value.incl_service.s_handle,
p_data->value.incl_service.e_handle,
p_data->value.incl_service.service_type);
if (!pri_srvc)
bta_gattc_add_srvc_to_list(
p_srvc_cb, p_data->value.incl_service.s_handle,
p_data->value.incl_service.e_handle,
p_data->value.incl_service.service_type, false);
/* add into database */
bta_gattc_add_attr_to_cache(
p_srvc_cb, p_data->handle, &p_data->value.incl_service.service_type,
pri_srvc, p_data->value.incl_service.s_handle,
BTA_GATTC_ATTR_TYPE_INCL_SRVC);
break;
case GATT_DISC_CHAR:
/* add char value into database */
bta_gattc_add_char_to_list(p_srvc_cb, p_data->handle,
p_data->value.dclr_value.val_handle,
p_data->value.dclr_value.char_uuid,
p_data->value.dclr_value.char_prop);
break;
case GATT_DISC_CHAR_DSCPT:
bta_gattc_add_attr_to_cache(p_srvc_cb, p_data->handle, &p_data->type, 0,
0 /* incl_srvc_handle */,
BTA_GATTC_ATTR_TYPE_CHAR_DESCR);
break;
}
}
}
void bta_gattc_disc_cmpl_cback(uint16_t conn_id, tGATT_DISC_TYPE disc_type,
tGATT_STATUS status) {
tBTA_GATTC_SERV* p_srvc_cb;
tBTA_GATTC_CLCB* p_clcb = bta_gattc_find_clcb_by_conn_id(conn_id);
if (p_clcb && (status != GATT_SUCCESS || p_clcb->status != GATT_SUCCESS)) {
if (status == GATT_SUCCESS) p_clcb->status = status;
bta_gattc_sm_execute(p_clcb, BTA_GATTC_DISCOVER_CMPL_EVT, NULL);
return;
}
p_srvc_cb = bta_gattc_find_scb_by_cid(conn_id);
if (p_srvc_cb != NULL) {
switch (disc_type) {
case GATT_DISC_SRVC_ALL:
case GATT_DISC_SRVC_BY_UUID:
#if (BTA_GATT_DEBUG == TRUE)
bta_gattc_display_explore_record(p_srvc_cb->p_srvc_list,
p_srvc_cb->next_avail_idx);
#endif
bta_gattc_explore_srvc(conn_id, p_srvc_cb);
break;
case GATT_DISC_INC_SRVC:
bta_gattc_incl_srvc_disc_cmpl(conn_id, p_srvc_cb);
break;
case GATT_DISC_CHAR:
#if (BTA_GATT_DEBUG == TRUE)
bta_gattc_display_explore_record(p_srvc_cb->p_srvc_list,
p_srvc_cb->next_avail_idx);
#endif
bta_gattc_char_disc_cmpl(conn_id, p_srvc_cb);
break;
case GATT_DISC_CHAR_DSCPT:
bta_gattc_char_dscpt_disc_cmpl(conn_id, p_srvc_cb);
break;
}
}
}
/*******************************************************************************
*
* Function bta_gattc_search_service
*
* Description search local cache for matching service record.
*
* Returns false if map can not be found.
*
******************************************************************************/
void bta_gattc_search_service(tBTA_GATTC_CLCB* p_clcb, tBT_UUID* p_uuid) {
tBTA_GATTC cb_data;
if (!p_clcb->p_srcb->p_srvc_cache ||
list_is_empty(p_clcb->p_srcb->p_srvc_cache))
return;
for (list_node_t* sn = list_begin(p_clcb->p_srcb->p_srvc_cache);
sn != list_end(p_clcb->p_srcb->p_srvc_cache); sn = list_next(sn)) {
tBTA_GATTC_SERVICE* p_cache = (tBTA_GATTC_SERVICE*)list_node(sn);
if (!bta_gattc_uuid_compare(p_uuid, &p_cache->uuid, false)) continue;
#if (BTA_GATT_DEBUG == TRUE)
APPL_TRACE_DEBUG("found service [0x%04x], inst[%d] handle [%d]",
p_cache->uuid.uu.uuid16, p_cache->handle,
p_cache->s_handle);
#endif
if (!p_clcb->p_rcb->p_cback) continue;
memset(&cb_data, 0, sizeof(tBTA_GATTC));
cb_data.srvc_res.conn_id = p_clcb->bta_conn_id;
cb_data.srvc_res.service_uuid.inst_id = p_cache->handle;
memcpy(&cb_data.srvc_res.service_uuid.uuid, &p_cache->uuid,
sizeof(tBTA_GATT_ID));
(*p_clcb->p_rcb->p_cback)(BTA_GATTC_SEARCH_RES_EVT, &cb_data);
}
}
list_t* bta_gattc_get_services_srcb(tBTA_GATTC_SERV* p_srcb) {
if (!p_srcb || !p_srcb->p_srvc_cache || list_is_empty(p_srcb->p_srvc_cache))
return NULL;
return p_srcb->p_srvc_cache;
}
const list_t* bta_gattc_get_services(uint16_t conn_id) {
tBTA_GATTC_CLCB* p_clcb = bta_gattc_find_clcb_by_conn_id(conn_id);
if (p_clcb == NULL) return NULL;
tBTA_GATTC_SERV* p_srcb = p_clcb->p_srcb;
return bta_gattc_get_services_srcb(p_srcb);
}
tBTA_GATTC_SERVICE* bta_gattc_find_matching_service(const list_t* services,
uint16_t handle) {
if (!services || list_is_empty(services)) return NULL;
for (list_node_t* sn = list_begin(services); sn != list_end(services);
sn = list_next(sn)) {
tBTA_GATTC_SERVICE* service = (tBTA_GATTC_SERVICE*)list_node(sn);
if (handle >= service->s_handle && handle <= service->e_handle)
return service;
}
return NULL;
}
const tBTA_GATTC_SERVICE* bta_gattc_get_service_for_handle_srcb(
tBTA_GATTC_SERV* p_srcb, uint16_t handle) {
const list_t* services = bta_gattc_get_services_srcb(p_srcb);
return bta_gattc_find_matching_service(services, handle);
}
const tBTA_GATTC_SERVICE* bta_gattc_get_service_for_handle(uint16_t conn_id,
uint16_t handle) {
const list_t* services = bta_gattc_get_services(conn_id);
return bta_gattc_find_matching_service(services, handle);
}
tBTA_GATTC_CHARACTERISTIC* bta_gattc_get_characteristic_srcb(
tBTA_GATTC_SERV* p_srcb, uint16_t handle) {
const tBTA_GATTC_SERVICE* service =
bta_gattc_get_service_for_handle_srcb(p_srcb, handle);
if (!service) return NULL;
for (list_node_t* cn = list_begin(service->characteristics);
cn != list_end(service->characteristics); cn = list_next(cn)) {
tBTA_GATTC_CHARACTERISTIC* p_char =
(tBTA_GATTC_CHARACTERISTIC*)list_node(cn);
if (handle == p_char->handle) return p_char;
}
return NULL;
}
tBTA_GATTC_CHARACTERISTIC* bta_gattc_get_characteristic(uint16_t conn_id,
uint16_t handle) {
tBTA_GATTC_CLCB* p_clcb = bta_gattc_find_clcb_by_conn_id(conn_id);
if (p_clcb == NULL) return NULL;
tBTA_GATTC_SERV* p_srcb = p_clcb->p_srcb;
return bta_gattc_get_characteristic_srcb(p_srcb, handle);
}
tBTA_GATTC_DESCRIPTOR* bta_gattc_get_descriptor_srcb(tBTA_GATTC_SERV* p_srcb,
uint16_t handle) {
const tBTA_GATTC_SERVICE* service =
bta_gattc_get_service_for_handle_srcb(p_srcb, handle);
if (!service) {
return NULL;
}
for (list_node_t* cn = list_begin(service->characteristics);
cn != list_end(service->characteristics); cn = list_next(cn)) {
tBTA_GATTC_CHARACTERISTIC* p_char =
(tBTA_GATTC_CHARACTERISTIC*)list_node(cn);
for (list_node_t* dn = list_begin(p_char->descriptors);
dn != list_end(p_char->descriptors); dn = list_next(dn)) {
tBTA_GATTC_DESCRIPTOR* p_desc = (tBTA_GATTC_DESCRIPTOR*)list_node(dn);
if (handle == p_desc->handle) return p_desc;
}
}
return NULL;
}
tBTA_GATTC_DESCRIPTOR* bta_gattc_get_descriptor(uint16_t conn_id,
uint16_t handle) {
tBTA_GATTC_CLCB* p_clcb = bta_gattc_find_clcb_by_conn_id(conn_id);
if (p_clcb == NULL) return NULL;
tBTA_GATTC_SERV* p_srcb = p_clcb->p_srcb;
return bta_gattc_get_descriptor_srcb(p_srcb, handle);
}
/*******************************************************************************
*
* Function bta_gattc_fill_gatt_db_el
*
* Description fill a btgatt_db_element_t value
*
* Returns None.
*
******************************************************************************/
void bta_gattc_fill_gatt_db_el(btgatt_db_element_t* p_attr,
bt_gatt_db_attribute_type_t type,
uint16_t att_handle, uint16_t s_handle,
uint16_t e_handle, uint16_t id, tBT_UUID uuid,
uint8_t prop) {
p_attr->type = type;
p_attr->attribute_handle = att_handle;
p_attr->start_handle = s_handle;
p_attr->end_handle = e_handle;
p_attr->id = id;
p_attr->properties = prop;
// Permissions are not discoverable using the attribute protocol.
// Core 5.0, Part F, 3.2.5 Attribute Permissions
p_attr->permissions = 0;
bta_to_btif_uuid(&p_attr->uuid, &uuid);
}
/*******************************************************************************
* Returns number of elements inside db from start_handle to end_handle
******************************************************************************/
static size_t bta_gattc_get_db_size(list_t* services, uint16_t start_handle,
uint16_t end_handle) {
if (!services || list_is_empty(services)) return 0;
size_t db_size = 0;
for (list_node_t* sn = list_begin(services); sn != list_end(services);
sn = list_next(sn)) {
tBTA_GATTC_SERVICE* p_cur_srvc = (tBTA_GATTC_SERVICE*)list_node(sn);
if (p_cur_srvc->s_handle < start_handle) continue;
if (p_cur_srvc->e_handle > end_handle) break;
db_size++;
if (!p_cur_srvc->characteristics ||
list_is_empty(p_cur_srvc->characteristics))
continue;
for (list_node_t* cn = list_begin(p_cur_srvc->characteristics);
cn != list_end(p_cur_srvc->characteristics); cn = list_next(cn)) {
tBTA_GATTC_CHARACTERISTIC* p_char =
(tBTA_GATTC_CHARACTERISTIC*)list_node(cn);
db_size++;
if (p_char->descriptors) db_size += list_length(p_char->descriptors);
}
if (p_cur_srvc->included_svc) {
db_size += list_length(p_cur_srvc->included_svc);
}
}
return db_size;
}
/*******************************************************************************
*
* Function bta_gattc_get_gatt_db_impl
*
* Description copy the server GATT database into db parameter.
*
* Parameters p_srvc_cb: server.
* db: output parameter which will contain GATT database copy.
* Caller is responsible for freeing it.
* count: output parameter which will contain number of
* elements in database.
*
* Returns None.
*
******************************************************************************/
static void bta_gattc_get_gatt_db_impl(tBTA_GATTC_SERV* p_srvc_cb,
uint16_t start_handle,
uint16_t end_handle,
btgatt_db_element_t** db, int* count) {
APPL_TRACE_DEBUG("%s: start_handle 0x%04x, end_handle 0x%04x", __func__,
start_handle, end_handle);
if (!p_srvc_cb->p_srvc_cache || list_is_empty(p_srvc_cb->p_srvc_cache)) {
*count = 0;
*db = NULL;
return;
}
size_t db_size =
bta_gattc_get_db_size(p_srvc_cb->p_srvc_cache, start_handle, end_handle);
void* buffer = osi_malloc(db_size * sizeof(btgatt_db_element_t));
btgatt_db_element_t* curr_db_attr = (btgatt_db_element_t*)buffer;
for (list_node_t* sn = list_begin(p_srvc_cb->p_srvc_cache);
sn != list_end(p_srvc_cb->p_srvc_cache); sn = list_next(sn)) {
tBTA_GATTC_SERVICE* p_cur_srvc = (tBTA_GATTC_SERVICE*)list_node(sn);
if (p_cur_srvc->s_handle < start_handle) continue;
if (p_cur_srvc->e_handle > end_handle) break;
bta_gattc_fill_gatt_db_el(
curr_db_attr, p_cur_srvc->is_primary ? BTGATT_DB_PRIMARY_SERVICE
: BTGATT_DB_SECONDARY_SERVICE,
0 /* att_handle */, p_cur_srvc->s_handle, p_cur_srvc->e_handle,
p_cur_srvc->s_handle, p_cur_srvc->uuid, 0 /* prop */);
curr_db_attr++;
if (!p_cur_srvc->characteristics ||
list_is_empty(p_cur_srvc->characteristics))
continue;
for (list_node_t* cn = list_begin(p_cur_srvc->characteristics);
cn != list_end(p_cur_srvc->characteristics); cn = list_next(cn)) {
tBTA_GATTC_CHARACTERISTIC* p_char =
(tBTA_GATTC_CHARACTERISTIC*)list_node(cn);
bta_gattc_fill_gatt_db_el(curr_db_attr, BTGATT_DB_CHARACTERISTIC,
p_char->handle, 0 /* s_handle */,
0 /* e_handle */, p_char->handle, p_char->uuid,
p_char->properties);
curr_db_attr++;
if (!p_char->descriptors || list_is_empty(p_char->descriptors)) continue;
for (list_node_t* dn = list_begin(p_char->descriptors);
dn != list_end(p_char->descriptors); dn = list_next(dn)) {
tBTA_GATTC_DESCRIPTOR* p_desc = (tBTA_GATTC_DESCRIPTOR*)list_node(dn);
bta_gattc_fill_gatt_db_el(curr_db_attr, BTGATT_DB_DESCRIPTOR,
p_desc->handle, 0 /* s_handle */,
0 /* e_handle */, p_desc->handle,
p_desc->uuid, 0 /* property */);
curr_db_attr++;
}
}
if (!p_cur_srvc->included_svc || list_is_empty(p_cur_srvc->included_svc))
continue;
for (list_node_t* isn = list_begin(p_cur_srvc->included_svc);
isn != list_end(p_cur_srvc->included_svc); isn = list_next(isn)) {
tBTA_GATTC_INCLUDED_SVC* p_isvc =
(tBTA_GATTC_INCLUDED_SVC*)list_node(isn);
bta_gattc_fill_gatt_db_el(curr_db_attr, BTGATT_DB_INCLUDED_SERVICE,
p_isvc->handle, 0 /* s_handle */,
0 /* e_handle */, p_isvc->handle, p_isvc->uuid,
0 /* property */);
curr_db_attr++;
}
}
*db = (btgatt_db_element_t*)buffer;
*count = db_size;
}
/*******************************************************************************
*
* Function bta_gattc_get_gatt_db
*
* Description copy the server GATT database into db parameter.
*
* Parameters conn_id: connection ID which identify the server.
* db: output parameter which will contain GATT database copy.
* Caller is responsible for freeing it.
* count: number of elements in database.
*
* Returns None.
*
******************************************************************************/
void bta_gattc_get_gatt_db(uint16_t conn_id, uint16_t start_handle,
uint16_t end_handle, btgatt_db_element_t** db,
int* count) {
tBTA_GATTC_CLCB* p_clcb = bta_gattc_find_clcb_by_conn_id(conn_id);
LOG_DEBUG(LOG_TAG, "%s", __func__);
if (p_clcb == NULL) {
APPL_TRACE_ERROR("Unknown conn ID: %d", conn_id);
return;
}
if (p_clcb->state != BTA_GATTC_CONN_ST) {
APPL_TRACE_ERROR("server cache not available, CLCB state = %d",
p_clcb->state);
return;
}
if (!p_clcb->p_srcb ||
p_clcb->p_srcb->p_srvc_list || /* no active discovery */
!p_clcb->p_srcb->p_srvc_cache) {
APPL_TRACE_ERROR("No server cache available");
return;
}
bta_gattc_get_gatt_db_impl(p_clcb->p_srcb, start_handle, end_handle, db,
count);
}
/*******************************************************************************
*
* Function bta_gattc_rebuild_cache
*
* Description rebuild server cache from NV cache.
*
* Parameters
*
* Returns None.
*
******************************************************************************/
void bta_gattc_rebuild_cache(tBTA_GATTC_SERV* p_srvc_cb, uint16_t num_attr,
tBTA_GATTC_NV_ATTR* p_attr) {
/* first attribute loading, initialize buffer */
APPL_TRACE_ERROR("%s: bta_gattc_rebuild_cache", __func__);
list_free(p_srvc_cb->p_srvc_cache);
p_srvc_cb->p_srvc_cache = NULL;
while (num_attr > 0 && p_attr != NULL) {
switch (p_attr->attr_type) {
case BTA_GATTC_ATTR_TYPE_SRVC:
bta_gattc_add_srvc_to_cache(p_srvc_cb, p_attr->s_handle,
p_attr->e_handle, &p_attr->uuid,
p_attr->is_primary);
break;
case BTA_GATTC_ATTR_TYPE_CHAR:
// TODO(jpawlowski): store decl_handle properly.
bta_gattc_add_char_to_cache(p_srvc_cb, p_attr->s_handle,
p_attr->s_handle, &p_attr->uuid,
p_attr->prop);
break;
case BTA_GATTC_ATTR_TYPE_CHAR_DESCR:
case BTA_GATTC_ATTR_TYPE_INCL_SRVC:
bta_gattc_add_attr_to_cache(p_srvc_cb, p_attr->s_handle, &p_attr->uuid,
p_attr->prop, p_attr->incl_srvc_handle,
p_attr->attr_type);
break;
}
p_attr++;
num_attr--;
}
}
/*******************************************************************************
*
* Function bta_gattc_fill_nv_attr
*
* Description fill a NV attribute entry value
*
* Returns None.
*
******************************************************************************/
void bta_gattc_fill_nv_attr(tBTA_GATTC_NV_ATTR* p_attr, uint8_t type,
uint16_t s_handle, uint16_t e_handle, tBT_UUID uuid,
uint8_t prop, uint16_t incl_srvc_handle,
bool is_primary) {
p_attr->s_handle = s_handle;
p_attr->e_handle = e_handle;
p_attr->attr_type = type;
p_attr->is_primary = is_primary;
p_attr->id = 0;
p_attr->prop = prop;
p_attr->incl_srvc_handle = incl_srvc_handle;
memcpy(&p_attr->uuid, &uuid, sizeof(tBT_UUID));
}
/*******************************************************************************
*
* Function bta_gattc_cache_save
*
* Description save the server cache into NV
*
* Returns None.
*
******************************************************************************/
void bta_gattc_cache_save(tBTA_GATTC_SERV* p_srvc_cb, uint16_t conn_id) {
if (!p_srvc_cb->p_srvc_cache || list_is_empty(p_srvc_cb->p_srvc_cache))
return;
int i = 0;
size_t db_size =
bta_gattc_get_db_size(p_srvc_cb->p_srvc_cache, 0x0000, 0xFFFF);
tBTA_GATTC_NV_ATTR* nv_attr =
(tBTA_GATTC_NV_ATTR*)osi_malloc(db_size * sizeof(tBTA_GATTC_NV_ATTR));
for (list_node_t* sn = list_begin(p_srvc_cb->p_srvc_cache);
sn != list_end(p_srvc_cb->p_srvc_cache); sn = list_next(sn)) {
tBTA_GATTC_SERVICE* p_cur_srvc = (tBTA_GATTC_SERVICE*)list_node(sn);
bta_gattc_fill_nv_attr(&nv_attr[i++], BTA_GATTC_ATTR_TYPE_SRVC,
p_cur_srvc->s_handle, p_cur_srvc->e_handle,
p_cur_srvc->uuid, 0 /* properties */,
0 /* incl_srvc_handle */, p_cur_srvc->is_primary);
}
for (list_node_t* sn = list_begin(p_srvc_cb->p_srvc_cache);
sn != list_end(p_srvc_cb->p_srvc_cache); sn = list_next(sn)) {
tBTA_GATTC_SERVICE* p_cur_srvc = (tBTA_GATTC_SERVICE*)list_node(sn);
if (!p_cur_srvc->characteristics ||
list_is_empty(p_cur_srvc->characteristics))
continue;
for (list_node_t* cn = list_begin(p_cur_srvc->characteristics);
cn != list_end(p_cur_srvc->characteristics); cn = list_next(cn)) {
tBTA_GATTC_CHARACTERISTIC* p_char =
(tBTA_GATTC_CHARACTERISTIC*)list_node(cn);
bta_gattc_fill_nv_attr(
&nv_attr[i++], BTA_GATTC_ATTR_TYPE_CHAR, p_char->handle, 0,
p_char->uuid, p_char->properties, 0 /* incl_srvc_handle */, false);
if (!p_char->descriptors || list_is_empty(p_char->descriptors)) continue;
for (list_node_t* dn = list_begin(p_char->descriptors);
dn != list_end(p_char->descriptors); dn = list_next(dn)) {
tBTA_GATTC_DESCRIPTOR* p_desc = (tBTA_GATTC_DESCRIPTOR*)list_node(dn);
bta_gattc_fill_nv_attr(
&nv_attr[i++], BTA_GATTC_ATTR_TYPE_CHAR_DESCR, p_desc->handle, 0,
p_desc->uuid, 0 /* properties */, 0 /* incl_srvc_handle */, false);
}
}
if (!p_cur_srvc->included_svc || list_is_empty(p_cur_srvc->included_svc))
continue;
for (list_node_t* an = list_begin(p_cur_srvc->included_svc);
an != list_end(p_cur_srvc->included_svc); an = list_next(an)) {
tBTA_GATTC_INCLUDED_SVC* p_isvc = (tBTA_GATTC_INCLUDED_SVC*)list_node(an);
bta_gattc_fill_nv_attr(&nv_attr[i++], BTA_GATTC_ATTR_TYPE_INCL_SRVC,
p_isvc->handle, 0, p_isvc->uuid,
0 /* properties */,
p_isvc->included_service->s_handle, false);
}
}
bta_gattc_cache_write(p_srvc_cb->server_bda, db_size, nv_attr);
osi_free(nv_attr);
}
/*******************************************************************************
*
* Function bta_gattc_cache_load
*
* Description Load GATT cache from storage for server.
*
* Parameter p_clcb: pointer to server clcb, that will
* be filled from storage
* Returns true on success, false otherwise
*
******************************************************************************/
bool bta_gattc_cache_load(tBTA_GATTC_CLCB* p_clcb) {
char fname[255] = {0};
bta_gattc_generate_cache_file_name(fname, sizeof(fname),
p_clcb->p_srcb->server_bda);
FILE* fd = fopen(fname, "rb");
if (!fd) {
APPL_TRACE_ERROR("%s: can't open GATT cache file %s for reading, error: %s",
__func__, fname, strerror(errno));
return false;
}
uint16_t cache_ver = 0;
tBTA_GATTC_NV_ATTR* attr = NULL;
bool success = false;
uint16_t num_attr = 0;
if (fread(&cache_ver, sizeof(uint16_t), 1, fd) != 1) {
APPL_TRACE_ERROR("%s: can't read GATT cache version from: %s", __func__,
fname);
goto done;
}
if (cache_ver != GATT_CACHE_VERSION) {
APPL_TRACE_ERROR("%s: wrong GATT cache version: %s", __func__, fname);
goto done;
}
if (fread(&num_attr, sizeof(uint16_t), 1, fd) != 1) {
APPL_TRACE_ERROR("%s: can't read number of GATT attributes: %s", __func__,
fname);
goto done;
}
if (num_attr > 0xFFFF) {
APPL_TRACE_ERROR("%s: more than 0xFFFF GATT attributes: %s", __func__, fname);
goto done;
}
attr = (tBTA_GATTC_NV_ATTR*)osi_malloc(sizeof(tBTA_GATTC_NV_ATTR) * num_attr);
if (fread(attr, sizeof(tBTA_GATTC_NV_ATTR), num_attr, fd) != num_attr) {
APPL_TRACE_ERROR("%s: can't read GATT attributes: %s", __func__, fname);
goto done;
}
bta_gattc_rebuild_cache(p_clcb->p_srcb, num_attr, attr);
success = true;
done:
osi_free(attr);
fclose(fd);
return success;
}
/*******************************************************************************
*
* Function bta_gattc_cache_write
*
* Description This callout function is executed by GATT when a server
* cache is available to save.
*
* Parameter server_bda: server bd address of this cache belongs to
* num_attr: number of attribute to be save.
* attr: pointer to the list of attributes to save.
* Returns
*
******************************************************************************/
static void bta_gattc_cache_write(const RawAddress& server_bda,
uint16_t num_attr, tBTA_GATTC_NV_ATTR* attr) {
char fname[255] = {0};
bta_gattc_generate_cache_file_name(fname, sizeof(fname), server_bda);
FILE* fd = fopen(fname, "wb");
if (!fd) {
APPL_TRACE_ERROR("%s: can't open GATT cache file for writing: %s", __func__,
fname);
return;
}
uint16_t cache_ver = GATT_CACHE_VERSION;
if (fwrite(&cache_ver, sizeof(uint16_t), 1, fd) != 1) {
APPL_TRACE_ERROR("%s: can't write GATT cache version: %s", __func__, fname);
fclose(fd);
return;
}
if (fwrite(&num_attr, sizeof(uint16_t), 1, fd) != 1) {
APPL_TRACE_ERROR("%s: can't write GATT cache attribute count: %s", __func__,
fname);
fclose(fd);
return;
}
if (fwrite(attr, sizeof(tBTA_GATTC_NV_ATTR), num_attr, fd) != num_attr) {
APPL_TRACE_ERROR("%s: can't write GATT cache attributes: %s", __func__,
fname);
fclose(fd);
return;
}
fclose(fd);
}
/*******************************************************************************
*
* Function bta_gattc_cache_reset
*
* Description This callout function is executed by GATTC to reset cache in
* application
*
* Parameter server_bda: server bd address of this cache belongs to
*
* Returns void.
*
******************************************************************************/
void bta_gattc_cache_reset(const RawAddress& server_bda) {
BTIF_TRACE_DEBUG("%s", __func__);
char fname[255] = {0};
bta_gattc_generate_cache_file_name(fname, sizeof(fname), server_bda);
unlink(fname);
}